A soluble compound of a poisonous element M, when heated with Zn/H2SO4 gives a colourless and extremely poisonous gaseous compound N, which on passing through a heated tube give a silvery mirror of element M. identify M and N.
A soluble compound of a poisonous element M, when heated with Zn/H2SO4 gives a colourless and extremely poisonous gaseous compound N, which on passing through a heated tube give a silvery mirror of element M. identify M and N.










